Citation
Shadparvar A., . and Shekalgorabi S. J., . (2004) Construction of a selection index to maximize profits in dairy cattle. [Proceedings Paper]
Abstract
Three types of selection indexes were constructed for the Iranian Holstein cows in order to maximize profits. The first one included the information on milk yield milk fat percentage and herd life as breeding goal traits. The second index included the two production traits but instead of herd life three traits Rear Udder Height Front Teats Placement and Front Udder Attachment respectively are correlated to herd life. The third one included only milk yield. The estimates of economic values for years 1994 and 1999 were used. Genetic gain in breeding goal resulted from various indices was estimated in different years. The second index that have the most number of traits and the third index with the fewest number of traits resulted in the highest and the least gain respectively. The result showed indirect selection for herd life by including type traits is more efficient than its direct selection.
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Abstract
Three types of selection indexes were constructed for the Iranian Holstein cows in order to maximize profits. The first one included the information on milk yield milk fat percentage and herd life as breeding goal traits. The second index included the two production traits but instead of herd life three traits Rear Udder Height Front Teats Placement and Front Udder Attachment respectively are correlated to herd life. The third one included only milk yield. The estimates of economic values for years 1994 and 1999 were used. Genetic gain in breeding goal resulted from various indices was estimated in different years. The second index that have the most number of traits and the third index with the fewest number of traits resulted in the highest and the least gain respectively. The result showed indirect selection for herd life by including type traits is more efficient than its direct selection.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia HD9410.1 A111 2004 vol.3 Call Number |
| AGROVOC Term: | Dairy cattle |
| AGROVOC Term: | Breeding |
| AGROVOC Term: | Cows |
| AGROVOC Term: | Selection index |
| AGROVOC Term: | Profit |
| AGROVOC Term: | Yields |
| AGROVOC Term: | Milk yield |
| AGROVOC Term: | Milk fat |
| AGROVOC Term: | Herds |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:14 |
| URI: | http://webagris.upm.edu.my/id/eprint/12043 |
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